Chosen Solution
Hallo ,, I have bought a macbook pro md 101 mid 2012, when the macbook first boot and show the lockscreen , I can’t click the trackpad, for example click the help icon or shutdown button or restart button but when I using mouse, and click in help icon , it works, and then the trackpad working normally the trackpad cannot used for the first time macbook booting I’m sorry for my bad english
Take that machine back and get your money back, it is of no use to you. The owner has locked it up via iCloud because it was stolen. macOS provides multiple methods to protect the data on a Mac: a user account password, encryption via FileVault, and optional low-level security measure that prevents starting up from storage devices other than the selected startup disk. That’s known as the firmware password or EFI (Extensible Firmware Interface) lock, which will also block the user’s ability to use all startup key combinations, except the NVRAM or PRAM reset combinations. This command (Option + Command + P + R), however, will initiate the machine from macOS Recovery instead. The Lost Mode feature of Find My Mac will remotely lock the Mac with a firmware password for one-time use. The user’s Mac receives the lock instruction from iCloud, restarts, and asks for the system lock PIN code that they set up. After entering the passcode the Mac starts up from the designated startup disk and disables the passcode.
